Ring-slot-testing device.



C. E. JOHNSON.

RING SLOT TESTING DEVICE.

APPUCATION men JAN. 22, 1915.

Patented Nov. 7, 19161 z/enfor Cflar/wJ/ms n Hi a/ 6%;

m:- Mums PETERS m. puma-mo. \VAS CHARLES E. JOHNSON, OF MUSKEGON, MICHIGAN.

RING-SLOT-TESTING DEVICE.

Specification of Letters Patent.

Patented Nov. 7, 1916.

Application filed January 22, 1916. Serial No. 73,605.

To all whom it may concern Be it known that' I, CHARLES E. JOHN- SON, a citizen of the United States of America, residing at Muskegon, in the county of Muskegon' and State of Michigan, have invented certain new and useful Improvements in Ring-Slot-Testing Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to a slot testing device especially adapted for use in testing the slots at the partings in finished piston rings of the snap ring type.

It is desirable that a piston ring at the parting thereof shall have a slot of correct width such that when the ends of the ring at the parting are brought together, and the parting entirely closed'the ring will be just received within the confines of a cylin. der in which it is to operate. If the slot is too wide when the ring is compressed so as to be received within such cylinder the ring is defective in that a gap is left for the passage of products of combustion from the combustion chamber and of lubricating oil to the combustion chamber; while if the slot is not Wide enough the ring cannot be received within the cylinder.

It is the object and purpose of my invention to provide a device through which the finished rings may be forced and in which the.

. width of the slot may be ascertained by vis ual inspection and a ring in which the slot is too wide be rejected while those in which the slot is not wide enough may be marked and returned for further machining. To these ends I have constructed the device shown in the accompanying drawing, in which; 1

Figure 1 is a plan'view thereof. -Fig. 2 is an end elevation. Fig. 8 is a side elevation partly in section taken from the left of Fig. 1; and Fig.4 is a vertical section taken centrally of the testing barrel of the machine.

Like reference characters refer to like parts throughout the several views of the drawing.

In the construction of the embodiment shown there is provided a body having a base 1 which may be attached to any suitable support and from which extend wings 2 upwardly and outwardly from each other forming a trough which serves as a guide for the rings introduced into the device and also as a guide for the plunger hereafter described and which is used to force the rings through the testing barrel. At one end an arm 3 is formed integral with the body a distance above it carrying a bolt 4- to which is pivotally connected a link 5, it in turn having pivotal connection with one end of the lever 6, which extends across the base and terminates in a handle 7. A. plunger 8 formed as a cylinder of metal is pivotally connected to lever 6, a slot being formed in one end of the plunger to receive the lever. Lengthwise of the plunger and adjacent its upper side a narrow slot terminating in a. circular enlargement is formed to receive the rod 9 from the upper side of which'projects a thin vane 10 through the slot and above the plunger, the rod and vane being loosely mounted in the plunger so as to be readily moved lengthwise thereof.

A testing barrel 11.is located in front of the plunger at the end of the body, it having an annular flange 12 by means of which it is rigidly connected by clips 13 to said body. The barrel at the end adjacent the plunger has an interior diameter sufficiently large to receive piston rings of the size to be tested in their normal uncompressed condition, but at a distance within the barrel its interior diameter is lessened gradually by tapering at 1% to form the testing section 15, the diameter of which is slightly larger than that of a cylinder in which the rings tested are designed for use. A wide slot 16 is cut in the upper side of the section 15, this slot being closed at both ends while in the outer end of the barrel and at its upper side a notch 17 is cut, the location. and formation of the slot and notch being fully dis closed in Figs. 1 and 4:.

It will be apparent that by operation of the lever 6 the plunger may be guided back and fort-l1 on the guides 52. The plunger is drawn outwardly and a quantity of rings is introduced in front of it, rod 9 being then moved forward so as to pass through the rings, the vane 10 engaging against the flange 12. 'The rings are then turned until the slots therein come opposite the vane 10 whereupon each ring will drop on to the rod 9, vane 10 passing through the slots thereof. It is of course understood that a piston ring when left free will, by reason of its inherent resiliency, tend to separate at the parting and that the vane can readily enter the comparatively wide slot that is thus made. After the rings have all been located with vane 10 in the slots thereof the handle 7 is grasped and the plunger operated to force the rings into the barrel. hen the rings reach the tapered interior portion at 14 they are compressed and the ends of the ring at the parting brought closer together. It will be apparent that, by reason of the positions of the rings with the vane 10 located in the slot at the parting before the rings are forced into the barrel the slot at the parting of each ring comes underneath the slot 16 in the testing barrel. The parting at 19 of the rings accordingly may be seen through this slot and one, after a little practice, can judge from the appearance of these slots at 19 whether or not a ring is properly formed. If the slot is too wide the ring may be marked for rejection while if it is too narrow when the ring is about to be ejected from the testing barrel its slot may be measured at the notch 17 and the amount to be machined or cut away, indicated on the ring after which it is returned for machining in accordance therewith.

l/Vith a testing device of this character a large quantity of rings may be tested with great rapidity, one man with this device being able to test as many as five men heretofore. Various slight changes in structural detail may be resorted to without departing from the invention, and accordingly I do not wish to be limited to the specific disclosure but consider myself entitled to, all modifications of structure falling within the scope of the appended claims defining the invention.

I claim 1. In a device of the character described, a support, a cylindrical testing barrel having a longitudinal slot therein, carried by the support, and means to force a plurality of piston rings through said barrel whereby the par-tings in said rings may pass by and be visible through the slot.

2. I11 a device of the character described, a body including a base having guides longitudinally disposed thereon, a cylindrical testing barrel having a slot in its upper side secured at one end of the body, and means to force a plurality of piston rings through .said barrel.

3. In a device of the character described. a body, a cylindrical testing barrel attached to the body, said barrel having a slot cut in its upper side, means to force piston rings through the barrel, and means to locate all Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

of the rings with the partings thereon in position to pass under the slot in the barrel.

4. In a device of the character described, a body comprised of a base having upwardly and outwardly diverging longitudinally disposed guides thereon, a plunger located to move over the guides, a testing barrel secured to the end of said body in front of the plunger, said barrel being provided with a longitudinal slot in its upper side, means for reciprocating the plunger over the guides, and means on the plunger for positioning piston rings with the slots therein in upper position.

5. In a device of the character described, a support, a plunger, guides on the support for guiding the movements of the plunger, means for moving the plunger back and forth and a testing barrel secured to the support in front of the plunger, saidv barrel at its front end having an interior diameter larger than at its rear testing section and provided with a longitudinal slot in the upper part of the rear testing section.

6. A testing barrel'comprised of a hollow cylinder having an interior diameter at the entrance end larger than the interior diameter at the opposite or testing end and with a tapering intermediate section leading from one section to the other, said testing section also being provided with a longitudinal slot in one side and with a notch in alinement with said slot at the end of the testing section.

7 In a device of the character described, a support, a hollow cylindrical testing barrel attached to the support, said barrel having a longitudinal slot in its upper side, a plunger mounted to move toward and from the barrel over the support, means to move the plunger, a rod loosely mounted lengthwise of and adjacent the upper side of the plunger, and a vane attached to the rod extending above the plunger, substantially as described.

8. In a device of the character described, a testing barrel provided with a longitudinal slot in one side and with a notch atone end in alinement with said slot, and means to force a plurality of piston rings through said barrel whereby the partings in said rings may pass by and be visible through the slot, and also pass by and be visible and accessible for measurement at said notch, substantially as described.

In testimony whereof -I affix my signature.

CHARLES E. JOHNSON.

Witnesses:

GEORGE D. VANDnRwnRr, CHRIS SCI-IRIER.

Washington, D. G. 

